epsilon (rocket)

7/29/2019 Epsilon (Rocket)

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Epsilon (rocket) 1

Epsilon (rocket)

Epsilon

Artist's impression

Function Carrier rocket

Country of origin Japan

Size

Height 24.4m

Diameter 2.5m

Mass 91t

Stages 34

Capacity

Payload to

250x500 km orbit3 stages

1,200 kilograms (2,600 lb)

Payload to

500 km orbit

4 stages

700 kilograms (1,500 lb)

Payload to

500 km SSO

4 stages

450 kilograms (990 lb)

Launch history

Status Active

Launch sites Uchinoura

Total launches 1

Successes 1

First flight September 14, 2013

First Stage - SRB-A3

Engines 1 solid

Thrust 2,271 kN

Specific impulse 284 seconds

Burn time 116 seconds

Fuel
http://en.wikipedia.org/w/index.php?title=Specific_impulsehttp://en.wikipedia.org/w/index.php?title=SRB-A3http://en.wikipedia.org/w/index.php?title=Uchinoura_Space_Centerhttp://en.wikipedia.org/w/index.php?title=Sun-synchronous_orbithttp://en.wikipedia.org/w/index.php?title=Carrier_rockethttp://en.wikipedia.org/w/index.php?title=File:Epsilon_rocket.png


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Epsilon (rocket) 2

Second Stage - M-34c

Engines 1 solid

Thrust 371.5 kN



Fuel

Third Stage - KM-V2b

Engines 1 solid

Thrust 99.8 kN



Fuel

Fourth Stage (optional) - CLPS

Engines

Thrust


Fuel

The Epsilon rocket (Ipushiron roketto) (formerly Advanced Solid Rocket) is a

Japanese solid-fuel rocket designed to launch scientific satellites. It is a follow-on project to the larger and more

expensive M-V rocket which was retired in 2006. The Japan Aerospace Exploration Agency (JAXA) began

developing the Epsilon in 2007. It is designed to be capable of placing a 1.2 tonne payload into low earth orbit.

Vehicle description

The development aim is to reduce costs compared to the US$70 million launch cost of an M-V. The Epsilon costs

US$38 million (23m) per launch, which is half the cost of its predecessor. Development expenditures by JAXA

exceeded US$200 million.

To reduce the cost per launch the Epsilon uses the existing SRB-A3 as a solid rocket booster on the H-IIA rocket as

its first stage. Existing M-V upper stages will be used for the second and third stages, with an optional fourth stage

available for launches to higher orbits. The J-1 rocket, which was developed during the 1990s, but abandoned after

just one launch, used a similar design concept, with an H-II booster and Mu-3S-II upper stages.[citation needed]

The Epsilon is expected to have a shorter launch preparation time than its predecessors. The rocket has a mass of 91tonnes (90 long tons; 100 short tons) and is 24.4 metres (80 ft) tall and 2.5 metres (8.2 ft) in diameter.

[1]

Thanks to a function called "mobile launch control", the rocket needs only eight people at the launch site, compared

with 150 people for earlier launches.
http://en.wikipedia.org/wiki/Citation_neededhttp://en.wikipedia.org/w/index.php?title=Mu-3S-IIhttp://en.wikipedia.org/w/index.php?title=H-IIhttp://en.wikipedia.org/w/index.php?title=J-I_%28rocket%29http://en.wikipedia.org/w/index.php?title=H-IIAhttp://en.wikipedia.org/w/index.php?title=Solid_rocket_boosterhttp://en.wikipedia.org/w/index.php?title=SRB-A3http://en.wikipedia.org/w/index.php?title=M-Vhttp://en.wikipedia.org/w/index.php?title=Low_earth_orbithttp://en.wikipedia.org/w/index.php?title=Japan_Aerospace_Exploration_Agencyhttp://en.wikipedia.org/w/index.php?title=M-Vhttp://en.wikipedia.org/w/index.php?title=Satellitehttp://en.wikipedia.org/w/index.php?title=Sciencehttp://en.wikipedia.org/w/index.php?title=Solid-fuel_rockethttp://en.wikipedia.org/w/index.php?title=Specific_impulsehttp://en.wikipedia.org/w/index.php?title=Compact_Liquid_Propulsion_Systemhttp://en.wikipedia.org/w/index.php?title=Specific_impulsehttp://en.wikipedia.org/w/index.php?title=KM-V2bhttp://en.wikipedia.org/w/index.php?title=Specific_impulsehttp://en.wikipedia.org/w/index.php?title=M-34c


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Epsilon (rocket) 3

Launch history

Epsilon rockets are launched from a pad at the Uchinoura Space Center previously used by Mu rockets. The maiden

flight, carrying the SPRINT-A scientific satellite, lifted off at 05:00 UTC (14:00 JST) on September 14, 2013. The

launch was conducted at a cost of $38 million.

On August 27, 2013, the first planned launch of the rocket had to be aborted 19 seconds before liftoff due to a

botched data transmission. A ground-based computer had tried to receive data from the rocket 0.07 seconds before

the information was actually transmitted.

The initial version of Epsilon has a payload capacity to low Earth orbit of up to 500 kilograms, with the operational

version expected to be able to place 1,200 kilograms (2,600 lb) into a 250 by 500 kilometre orbit, or 700 kilograms

to a circular orbit at 500 kilometres with the aid of a fourth stage.

Date/Time (UTC) Stages Payload Orbit (km) Outcome Remarks

September 14, 2013, 05:00 4 SPRINT-A (HISAKI) 950 x 1,150 x 31 Successful

Internet leakIn November 2012, JAXA reported that there had been a possible leak of rocket data due to a computer virus. JAXA

had previously been a victim of cyber-attacks, possibly for espionage purposes. Solid-fuel rocket data potentially has

military value. The Japan Aerospace Exploration Agency removed the infected computer from its network, and said

its M-V rocket and H-IIA and H-IIB rockets may have been compromised.

References

[1] Epsilon Launch Vehicle Information (http://www.spaceflight101.com/epsilon-launch-vehicle-information.html)

External links Epsilon launch vehicle (http://www.jaxa.jp/projects/rockets/solid/index_e.html), JAXA
http://www.jaxa.jp/projects/rockets/solid/index_e.htmlhttp://www.spaceflight101.com/epsilon-launch-vehicle-information.htmlhttp://en.wikipedia.org/w/index.php?title=SPRINT-Ahttp://en.wikipedia.org/w/index.php?title=SPRINT-Ahttp://en.wikipedia.org/w/index.php?title=Mu_%28rocket_family%29http://en.wikipedia.org/w/index.php?title=Uchinoura_Space_Center


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Article Sources and Contributors 4

Article Sources and ContributorsEpsilon (rocket) Source: http://en.wikipedia.org/w/index.php?oldid=573423555 Contributors: Exenola, Galactic Penguin SST, Hydrargyrum, Martarius, Mycomp, N2e, Oda Mari, Ohconfucius,

Phoenix7777, Rwendland, StevenD99, Trurle, WDGraham, Wctaiwan, WikiU2013, Yiosie2356, 23 anonymous edits

Image Sources, Licenses and ContributorsFile:Epsilon rocket.png Source: http://en.wikipedia.org/w/index.php?title=File:Epsilon_rocket.png License: Creative Commons Attribution-Sharealike 3.0 Contributors: Saya

License

Creative Commons Attribution-Share Alike 3.0 Unported//creativecommons.org/licenses/by-sa/3.0/

epsilon (rocket)

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